Anthropic closed a $65B funding round at $965B post-money valuation and launched Claude Opus 4.8 with improved coding and knowledge work capabilities at unchanged pricing. Marks Anthropic's overtake of OpenAI as most valuable AI startup; developers need to benchmark Opus 4.8 against GPT-5.5 for production deployments.

OpenAI released GPT-5.5 Instant on May 5 as the new default ChatGPT model, positioned as a faster, lower-cost alternative optimized for chat, code, and reasoning tasks. Developers can now select it as default via OpenAI API; impacts cost-benefit calculations for production inference.

Google revealed Gemini 3.5 Flash and multimodal Gemini Omni (capable of video generation from multiple prompt types) at Google I/O on May 19. Expands Google's competitive surface in frontier models and multimodal capabilities; relevant for teams evaluating video synthesis workflows.

Anthropic doubled rate limits on Claude Code and raised API limits for Claude Opus to support production scale, announced at company developer conference. Critical for teams on Claude-heavy inference; signals Anthropic prioritizing infrastructure reliability for enterprise adoption.